Remove a duplicate store when performing REL32 relocations in rtld.

The duplicate call to store_ptr() was added in r204687, but it should
have no effect as it only stores an Elf_Sword and the later store_ptr()
does a write that is at least as large if not larger.

Reviewed by:	jmallett
Obtained from:	CheriBSD (sort of)
Sponsored by:	DARPA / AFRL

libexec/rtld-elf/mips/reloc.c

@@ -215,7 +215,6 @@ _rtld_relocate_nonplt_self(Elf_Dyn *dynp, Elf_Addr relocbase)
 			sym = symtab + r_symndx;
 			assert(ELF_ST_BIND(sym->st_info) == STB_LOCAL);
 			val += relocbase;
-			store_ptr(where, val, sizeof(Elf_Sword));
 			dbg("REL32/L(%p) %p -> %p in <self>",
 			    where, (void *)old, (void *)val);
 			store_ptr(where, val, rlen);